app - ta -硅溶胶复合阻燃剂对杉木耐火性能的影响及建筑物火灾蔓延数值模拟

IF 3.1 2区 农林科学 Q1 FORESTRY
Hongyu Yang, Shanyang Wei, Xinli Zhao, Xingjia Liu
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引用次数: 0

摘要

为了开发一种新型的木材阻燃剂,将聚磷酸铵、单宁酸和硅溶胶组成的化合物添加到杉木中。本文研究了阻燃剂对阻燃木材耐火性的影响,并利用火焰动力学模拟器进行了数值模拟,分析了阻燃木材中火焰的传播动力学。通过正交试验确定最佳阻燃组合为F-STA1(阻燃硅溶胶:单宁酸:聚磷酸铵比例为2:1:1)和F-STA2(阻燃硅溶胶:单宁酸:聚磷酸铵比例为3:1:2)。其对应的限氧指数分别为34.2%和33.6%,阻燃等级为B1级,UL-94等级为V-0。热重分析表明,F-STA1、F-STA2和F-TA(无硅溶胶,单宁酸与聚磷酸铵比为1:2)在800℃时的残碳率分别提高了83.33%、114.22%和68.22%,F-STA1和F-STA2的峰值失重率明显低于F-Ctrl(对照组)。锥热分析表明,与对照相比,F-STA2的HRR(热释放率)和THR(总放热率)显著降低,分别降低了41.86%和38.41%。拉曼光谱显示,F-STA2的残碳ID/IG比降低了34.63%。此外,硅溶胶的加入显著提高了木材的机械性能;F-STA2的抗弯强度和模量分别提高55.47%和45.33%,抗压强度提高10.69%。模拟结果表明,阻燃剂的应用减少了木结构建筑的火焰蔓延、烟雾传播和温度变化的速度,有效地抑制了火灾的发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of APP-TA-silica sol compound flame retardant on fire resistance of Chinese fir and the fire spread numerical simulation in buildings

To develop a novel flame retardant that enhances the fire resistance of wood, a compound consisting of ammonium polyphosphate, tannic acid, and silica sol was integrated into Chinese fir. This study examined its effects on fire resistance and analyzed the dynamics of flame spread in flame-retardant wood using numerical simulations of the Fire Dynamics Simulator. The optimal flame retardant combinations, identified through orthogonal testing, were F-STA1 (Flame retardant silica sol: tannic acid: ammonium polyphosphate ratio of 2:1:1) and F-STA2 (Flame retardant silica sol: tannic acid: ammonium polyphosphate ratio of 3:1:2). Their corresponding limited oxygen index values were 34.2% and 33.6%, respectively, achieving a flame retardant classification of B1 level and a UL-94 rating of V-0. Thermogravimetric analysis revealed that the peak weight loss rates for F-STA1 and F-STA2 were substantially lower than those for the F-Ctrl (Control group), with increases in carbon residue rates of 83.33%, 114.22%, and 68.22%, at 800 °C for F-STA1, F-STA2, and F-TA (The flame retardant has no silica sol, and the tannic acid: ammonium polyphosphate ratio is 1:2), respectively. Cone calorimetric analysis indicated significant reductions in HRR (Heat Release Rate) and THR (Total Heat Release) for F-STA2, with decreases of 41.86% and 38.41% compared to the control. Raman spectroscopy demonstrated a reduction in the residual carbon ID/IG ratio by 34.63% for F-STA2. Furthermore, the addition of silica sol notably enhanced the mechanical properties of the wood; bending strength and modulus for F-STA2 improved by 55.47% and 45.33%, respectively, and compressive strength increased by 10.69%. Simulation outcomes suggest that flame retardant application reduces flame spread, smoke propagation, and the rate of temperature change in wood structure buildings, effectively inhibiting fire progression.

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来源期刊
Wood Science and Technology
Wood Science and Technology 工程技术-材料科学:纸与木材
CiteScore
5.90
自引率
5.90%
发文量
75
审稿时长
3 months
期刊介绍: Wood Science and Technology publishes original scientific research results and review papers covering the entire field of wood material science, wood components and wood based products. Subjects are wood biology and wood quality, wood physics and physical technologies, wood chemistry and chemical technologies. Latest advances in areas such as cell wall and wood formation; structural and chemical composition of wood and wood composites and their property relations; physical, mechanical and chemical characterization and relevant methodological developments, and microbiological degradation of wood and wood based products are reported. Topics related to wood technology include machining, gluing, and finishing, composite technology, wood modification, wood mechanics, creep and rheology, and the conversion of wood into pulp and biorefinery products.
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